package main

import "fmt"

const (
	a = iota
	b = iota
	c = iota
)

const (
	a2 = iota 
	b2 = iota
	_
	c2 = iota
)

const (
	a3 = iota
	b3 = 3
	c3 = iota
)

const (
	a4 = iota*2
	b4 = iota
	c4 = iota
)

const (
	a5 = iota *2
	b5
	c5
)

const (
	a6 = iota*2
	b6 = iota*3
	c6
	d6
)

const (
	a7,b7 = iota+1,iota*3
	c7,d7
	e7 = iota
)

func main() {
	fmt.Println(a,b,c)
	fmt.Println(a2,b2,c2)
	fmt.Println(a3,b3,c3)
	fmt.Println(a4,b4,c4)
	fmt.Println(a5,b5,c5)
	fmt.Println(a6,b6,c6,d6)
	fmt.Println(a7,b7,c7,d7,e7)
}